68 



LABORATORY MICROSCOPES 



{_CH. II 



Fig 67. 



^ 



Fig. 67a. 



Figs. 67, 67a. The removable mechanical stage of the Bausch & Lomb Opti- 

 cal Company. In the upper figure it is in position on the stage of the microscope ; 

 in the lower figure only the clamping part is in position, the rest having been 

 removed to leave the stage of the microscope free . 



